Light source



FIG. 1 is a top perspective view of a light source showing the claimed design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a left side view thereof, a right side view opposite the left side view being identical to FIG. 7.

The broken lines shown herein are for illustrative purpose only and form no part of the claimed design. 

CLAIM The ornamental design for light source, as shown and described. 